EZO365-Connect.psm1

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function Connect-ExchangeOnline
{
    [cmdletbinding()]
    Param
    (
        [Parameter(Mandatory=$false)]
        [Switch]$UseMFA
        ,
        [Parameter(Mandatory=$false)]
        $Credential
        ,
        [Parameter(Mandatory=$false)]
        $Commands = "*"
    )

    $existingSessions = Get-PSSession | ? { $_.ComputerName -eq 'outlook.office365.com'}

    if(!($existingSessions | ? { $_.State -eq 'Opened' -or $_.Availability -eq 'Available'}))
    {
        $existingSessions | Remove-PSSession -EA SI
        
        if($UseMFA)
        {
            Write-Verbose -Message "Attempting session creation with MFA credentials"
            
            try
            {
                $exoModule = "$((gci $env:LOCALAPPDATA\Apps\2.0\ -Filter Microsoft.Exchange.Management.ExoPowerShellModule.dll -Recurse).FullName | ? { $_ -notmatch "_none_" } | Select -First 1)"
                
                Import-Module $exoModule

                Write-Verbose -Message "Imported EXO module $($exoModule)"
            }
            catch
            {
                throw "Could not import ExoPowerShellModule.dll, please ensure Exchange Online PowerShell module is installed: $($_.Exception.Message)"
            }

            $session = New-ExoPSSession
        }
        else
        {
            Write-Verbose -Message "Attempting session creation with Non-MFA credentials"
            
            if(!$Credential)
            {
                $Credential = (Get-Credential -Message "Enter non-MFA credentials:") 
            }
            
            $session = New-PSSession    -Name ExchangeOnline `
                                        -ConfigurationName Microsoft.Exchange `
                                        -Credential $credential `
                                        -ConnectionUri https://outlook.office365.com/powershell-liveid/ `
                                        -Authentication Basic `
                                        -AllowRedirection `
                                        -WA SI
        }

        Import-Module (Import-PSSession -Session $session -AllowClobber -CommandName $Commands) -Global


    }
    else
    {
        Write-Verbose -Message "Exchange Online PowerShell session already available and imported."
    }
}

function Connect-SkypeForBusinessOnline
{
    [cmdletbinding()]
    Param
    (
        [Parameter(Mandatory=$false)]
        [Switch]$UseMFA
        ,
        [Parameter(Mandatory=$false)]
        $Credential
        ,
        [Parameter(Mandatory=$false)]
        $Commands = "*"
    )

    if(Get-Module -Name SkypeOnlineConnector)
    {
        $existingSessions = Get-PSSession | ? { $_.ComputerName -like 'admin*.online.lync.com'}

        if(!($existingSessions | ? { $_.State -eq 'Opened' -or $_.Availability -eq 'Available'}))
        {
            $existingSessions | Remove-PSSession -EA SI
            
            Import-Module SkypeOnlineConnector

            Write-Verbose -Message "Imported module SkypeOnlineConnector"
            
            if($UseMFA)
            {
                Write-Verbose -Message "Attempting Exchange Online session creation with MFA credentials"
                
                $session = New-CsOnlineSession
            }
            else
            {
                Write-Verbose -Message "Attempting Exchange Online session creation with Non-MFA credentials"
                
                if(!$Credential)
                {
                    $Credential = Get-Credential -Message 'Enter non-MFA credentials:'
                }
                
                $session = New-CsOnlineSession -Credential $Credential
            }

            Import-Module (Import-PSSession $session -CommandName $Commands) -Global
        }
        else
        {
            Write-Verbose -Message 'Skype for Business Online PowerShell session already available and imported'
        }
    }
    else
    {
        throw "SkypeOnlineConnector module not installed"
    }
}